Black flickering screen problem upon launch
When I boot up my MacBook (intel 2019 model) an error has started to pop up that I can't find the root of.
My entire screen, bar a few mm on the top, goes completely black. This happens only after I log in, and lasts a random amount of time between 5-10 minutes before disappearing completely, only to re-appear for brief periods when I'm using the laptop.
In the general settings, no apps start upon startup of the laptop, so I don't believe its that unless some apps can bypass that setting.
In safe mode the laptop launches fine. No black screen the entire time of usage.
I tried the other keyboard shortcuts that you're supposed to try during startup and they did nothing.
The error will always usually come back if the laptop goes to sleep mode or shutdown. Only after I log in. Only for a few minutes at a time. It is shorter when logging in from sleep mode then from completely powered down. Changing the brightness doesn't affect it/trigger it.
I will attach bellow a short list of the most common error lines I see come up in the Console during the black screen attacks if that helps at all.
Any advice would be greatly appreciated I'd love to fix this problem for good.
Console errors:
Invalid actual_host_time received from display: 0x4280f40 new time: 4434376083789 last time: 4434359420216
hid_event_callback: Invalid event type: 29
Missing CMContinuityCaptureCapabilitiesKey_Devices
No BeaconStoreActor available!
Sandbox: assistantd(578) deny(1) iokit-open-user-client AppleKeyStoreUserClient
Failed to open lockfile <private>: Error Domain=BiomeStorageError Code=2 "Wrong domain" UserInfo={NSLocalizedDescription=Wrong domain}
The invalid host time pops up almost non stop, the rest not so much.
Thank you in advance!
MacBook Pro 13″, macOS 26.0